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<br />w~~~ ~' Rohler; ;'; The, 'same. type of~ Roller,."and method of Rolh.rg as apecfied:.above`,under
<br />~' (a),FOUNDATION ha1T be :used `on Surface': - ` ''
<br />_ .f'
<br />~Lft"erirolhng' the.•lo~er~;caurse of".surface to a firm unyielding, condition, .•~.' ':.
<br />' ~ ~ full ruri~~,coke.;:oven :coal•~tar,.' heated • to ;•temperature = of notTess than ~ one hundred; _ . , '
<br />. ~-.~ and eighty degrees ' (180°_) and; not -more ~ than•.220° Fah, ~shall.•~~be applied at the
<br />.: rate of ,. one'and three fourths (1 .3/4) gallons per•.~ square yard by~ sp"rinkls.ng it
<br />TAR .~. `evenly over ,tle_~ surface•~ of~ macadam: by use;,of; a power driven~~pressure distributor, ~, „
<br />~~~' under pressure;' of at least twenty :(20) pounds persquare ixich, :The surface '
<br />' .. - ~ ~..apphcaton -shall. consist of full.`' `run coke oven ;coal tar having.-spec~,fic ;gravi~y_-,
<br />. .;
<br />•~ ~. at _25° C, of fi.18, ; to 1;,25, total bitumen soluble ;in G.S, 2, ~ 82~, to ~95 , : •
<br />.. ,
<br />~` inorgan~.c 'a.nso.luble less: than; 6~ olassifsed as Bs=:Ts 7-=8 and: 9, • The coal `tar :.
<br />shall be °kept -~heat,ed in ~~sui.table tanks .upon the -~~rork immediately",adjacent .to the'- ;`
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<br />place of aurfac~,appl~cation: ~ -
<br />. a. _
<br />. r ,.
<br />` ~ ~ ~ , Goarse screenings.- of same slag" as top_~.~surface, ranging ~.n ,size ~ from.-~!!: --t'o ~` • , .
<br />' 1~4,+~ (No; 46. State "Specification) shall ~-be applied to the tarred course ,bg •~
<br />. S'JRFACE•- ,.spreading evenly from time to t3.me_ to'.such a_ depth and;.iri such- quantities as -
<br />' will, when thoroughly rolled :brang~ the surface to .firiished,•grade' and proper -
<br />~~'~~ •crown. '':-~h~s,,c'ourse shall be "roll'ed until,. the tar flushes ao surface.~at regular-. .
<br />•~ 1.ritervals, ~ ~,: x a, ~ ~, ..
<br />- ,, _ ,
<br />~~ , , After the J.ayer of coarse screenings has become thoroughly. compact as.
<br />;~
<br />` ~ '., ,above specified,' there shaLl,. be "sprayed„rupon;; the surface suffs.cient .tar, at the ~~
<br />`: , ~~ ,"rate of ;bne~half (1/2) ` gallon per. ,yard ~.nd covere.d by "SilZCa gravel. ~or~ No, :6 .
<br />slag 5o~aha~.by contanuednrolling~ah uoids in the work are%completely filled
<br />L}, .
<br />~~, , : , .and an,-impervioussurface is ;produced by the. rollex, All apphcata.ons of tar -
<br />• ..:shall be; made° when`"'the •;,stone; is th"oroughly tivarm and dry,
<br />• - ~ ,
<br />_ ~ ~ -~'hile far is preferred for. a]1 penetrat~.on,work liquid .asphalt: may~tie~:,used,, if : ' . -
<br />-' approved:~by Council, Liquid. asphalt. sYiall be a -refs.ned,~native product or-: a- = -
<br />,. ~g~,fi. > '; product `of tYie distillation and r:ef i.ning of'` ordde,' petroleum. It , shalh be ~ free
<br />' - from coal tarpiteh or ~,-any of, its}-derivatives. ,~ It shall be ;homogeneous :and't
<br />free from water, ,liquid`asphalt 'shall,'conform to'.-thefollowing requirements
<br />..
<br />:Specifsc gravity at 25° C; not less than ~`~ 1r01 ~:
<br />..
<br />.. :penetration at 25° C ~~. 85' - 100p .
<br />;Flash'"poin~• {Cleveland .open cut} ~ • 175° C
<br />• ~ Soluble in. -~GS~2 • ~.. ~. 99~ ; ' . .
<br />..,
<br />-.t.. ~ organic,.insoluble, not less:"thane ~l~
<br />• ; .a ..
<br />> :. '.-;'~GENERAL•';CQNDITIONS.-AND REQUIINTS~.~PERTAINING TO' AT~L -BITUt~IN0t15 PRODUCTS.::.: ~~ , ..•
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<br />•~ CTosed conta~.ners, tanks, cars and, distributors must be used; ~o" retain ,volatiles~ '
<br />~.n-;bitumens-~~and to~:exclude razn~ :.,dust or other ob.~ectionable~~e'lemerits. producers ; ° .
<br />~; of .bitumnous-:'products :used will 1?e required to `submit. toy engineer •a',certfzcation::`t:
<br />~~ of .•,physical characteristics one each tank car:' used. `Upon completion of work owner : ,
<br />': must-furnish _to Gozncll:~an affidavit by hisContractor'that the bituminous product .'
<br />°: ` •.'~ '; •:.'used on;-the iiiwork did conform•.to -the foregoing requirements and. to the; producers; •_ ~- - ,
<br />,5
<br />~ ~ ~ - _ ,
<br />~ ~ ~ °~~~.The operators'` of distributors must be skilled in their ~ woxk and ,lay- down such ~~
<br />~°: =. , - amount of bitumen -per• square;:.yard `as herea:nbefore specified. A7,1 nozzles. must .be- ~ ,
<br />;- . _' in' working; :order .and pump maintain `uniform pressure ordered at : all..perlods 'arid. in ';. .
<br />- ~ noevent " below 30 :`pounds per- ~'aquare ziich; ~' ' ~. -. ~ _
<br />To.' preserve the Tine of macadam,', ;and :prevent stone or;. slag' from being .:
<br />cro~rded :auto ~ear'th.margns, the contractor may promde.; and place;-edge~; boards . , .
<br />-•r ~.~ ~- :to;~~full~deptYi~:., of:°~macadamo Boards ~halh be sound_~mater:al, ,`,-~with:= straight =edges. , -; ~,-.
<br />:', ~ conforming with gutter grade; These' boards may be reirioved~ by contractor upon
<br />EDGE .. ... , ,. - • ..., ~. : ~ f.~, .
<br />;BOARDS: ~ _ ~ ,~ . completion.. of pavement ~ .and ;earth firmly rammed, in, such spaces should contractor. I
<br />;elect to use =edge .:boards. '~ _- ~
<br />At, intervals; not exceeding .three~`hundr`ed feet, except; at grade;,aurAmits,
<br />a~~cia.tcli,y hav~.~g ~ a :wldth_~ of orie foot shall be .extended -at an~ even :grade from the:
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<br />EEPER• - subgrade at edge~,of pavement-to the bottora.;and side of• gutter=_or: ditch at. side. , _ .
<br />•. .. .,
<br />'_~INS '; ; OF--ROAD'. This shall be; filled wa:th No,. 1•~'or No,', 2 slag and hand. tamped so' Ehat'
<br />compacted surface shall:. conform. to finish cross section„ ;
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<br />~ >20-c ,
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